Telemotor apparatus.



W. G. GIBBONS. TELEMOTOR APPARATUS.

APPLIOATION PILED DEO.31,1907.

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Patented Aug, 10, 1909,

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WILLIAM GREGORYGIBBONS, OF EDINBURGH, SCOTLAND.

TELEMTOR APPARATUS.

No. 93o,955.

Specification' of Letters Patent.

` Patented Aug. 10, 1909.

Application filed December 31, 1907. S erial No. 108,851.

To all whom it may concem: 4

Be it known that l', WILLIAM GREGRY nnnoi s, a subject of the King of Great Britain and Ireland, and a resident of Edinburgh, in the County of Mid-Lothian, Scotland, have invented certain new and useful mprovements in Telemotor Apparatus, and of which the following is a specification.

The transmitting cylinders of 'certain- 'types of telemotor apparatus-for example,

such as is described in Browrs patent specification No. 622600 dated &th April, 1899- are made with central distance pieces between which and the opposite ends of the cylinders circumferential ports are formed. lt is essential that these ports should be as short axially as possible and it is indeed for this reason-that is that in this manner they could more easily be made very short-that the distance piece is used. But such an arrangement is open to several disabilities, in the first place, it is structurally very expensive; in the second place, if for any reason the parts be disconnected (the cylinder ends from the distance piece) their reassembly in alinement, with such appliances as are usually to be found on shipboard, is practically impossible-and obviously they must be in alinement, as otherwise 'the cup leathers on the piston will catch on the inner' lips of the ports and speedily be rendered useless.

The present invention has for its object to obvate these disabilities by forming the whole cylinder-its opposite ends and the central distance piece-in one piece.

In order that the invention and the manner of performing the same may be properly understood there are hereunto appended three sheets of explanatory drawings throughout which like reference letters indicate like parts, and in which Figures l and 2, Sheet l, are, respectively, horizontal and vertical sections of parts of a transmitting cylinder sufiicient to show one example of the invention, while Figs. 3 and 4, Sheet 2, and Fig. 5, Sheet 3, are all vertical sections showing three other examples.

In carrying out the invention according` to the exanple shown in Figs. 1 andw2, the" walls of a transmitting cylinder, A, are formed initially without break from end to end. About the center is formed an outer cylindrical or Conveniently shaped part, B,

nergng in the walls above and below but i centrally cored out so as to leave, with the exception of'webs, C, extending inward to what after-ward 'forms the distance piece, D, an annular space, E, between the part of the cylinder wall forming the distance piece and the 'wall of the part, B, embracing it. Apertures, G, afterward closed by doors are, of course, made in the embracing part, B, for the removal of the cores. After i boring thewhole cylnder the part, B, forming the equivalent for the usual distance piece is severed from the walls by convenient means-a fine circular saw. for example. The severing cuts, H, are so positioned above and below the part forming the distance piece, D, as to pass into the annular space, E, referred to and they are, of course, circumferential. The lips of the cuts are then rounded ofi in order that they may ofier no obstruction to the passage of the piston.

Alternatively, as shown in Fig. 3, the cylinder, A, may be formed With flanges, J, above and below the ports, H, to which fianges the outer casng or jacket, B, is bolt- 'ed. Of course, it is obvious in this case that completely circumferential ports cannot be made. Instead there are a series of segmental ports, H, in line-leaving between them buttress-like parts, K, of sutticient strength. Or as shown in Fig. 4, instead of leaving buttress parts in the thickness of the cylinder walls external buttresses, L, may be formed upon the cylinder, A, and the ports, H, be cut completely through the walls to them. `Again as shown in Fig. 5, the segmentalports shown in Fig. 3, may be in` the form of rings, H, of small holes drilled through the wall, A, at such distance apart as to leave between them buttress-like parts, K. The holes are countersunk on their inner side so as to practically eliminate the possibility of the piston packing catching in the ports.

It will be seen that the circumferential cuts or small holes form the narrgw ports,

`H, referred to in a Very effective manner,

while at the same time cost of manufacture is considerably reduced, and the whole being in one part cannot be' put ont of alinement; and consequently there is practically no possibility of the cup leathers catching in the ports and their life is therefore considerably increased.

It is to be understood that the method of E than the length of the pisten head so tht wlth the eyhnde Wa1ls,A, or separate therethe fluid on the opposte sdes of the pisten 15 from may be alternatively enployed in any head comnunicates through said annuhr of the eXamples described. f chanber and its pressure is equaled when What Iclam is z the piston head is in said position between In telemotor apparatus of the type desaidseries.

scribed, an integral transmitting eylinder In testinony whereof I have signed my 20 havingtwo series of narrow crcumferental ports opening through the Wall of said eylinder, and a jacket sur'roundingsaid cylinder and forming an annular ehanber into which the ports of both series open, said series being spacedapart a distance only slightly greater name to this specificztion, in the presence of two subscribing witnesses.

WILLIAM GREGORY GIBBONS. Htnesses FRANK EDDINGTON, FREDERIGK PIATT. 

